On Aug 27, 2010, at 9:09 AM, arvin mer wrote:
Hello to all,I have a data file as
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> dput(temp)
structure(list(Class = structure(c(1L, 1L, 2L, 3L, 3L, 2L), .Label =
c("A",
"B", "C"), class = "factor"), V1 = c(-2, 0.9, 0.1, 4.1, 1, 1.1
), V2 = c(0, 0.7, 0.6, 0.4, 1.9, 0.5)), .Names = c("Class", "V1",
"V2"), class = "data.frame", row.names = c(NA, -6L))
I am plotting this data in R as V1 verses V2
> temp<-read.table('temp.dat', header=T)
> attach(temp)> plot (V1,V2, col='red')
> text(x=V1, y=V2, labels=Class, pos=4)
But I want to change the 'plotting symbol' by the 'Class of the
row' (which is A,B,C).in other words "I want to use the A,B,C
instead of red circle and want different color for each class e.g.
Red for 'A', Green for 'B' and so on"
How to do that ??Thanks in advance
It would seem superfluous to plot with a character and then also label
it with characters. so see if this gets you any further. Note: I did
not attach() your dataframe, but rather used with():
with(temp, plot(V1 ,V2, col=c("red", "green", "blue")
[as.numeric(Class)]))
?plot # tells me that one cannot use a vector of characters for
plotting symbols
with(temp, text(x=V1, y=V2, labels=Class, pos=4))
# If you wanted to plot as characters you could use text after
plotting blanks I suppose.
with(temp, text(x=V1, y=V2, labels=Class, col=c("red", "green", "blue")
[as.numeric(Class)]))
Regards
Arvind
David Winsemius, MD
West Hartford, CT
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